Coke treatment and product



Patented Mar. 12,- 1929.

UNITED STATES PATENT orrlca.

ALLISON A. KOHR OI MAPLEWOOD, NEW JERSEY, ASSIGNOR TO THE KOPIEBS COR-.-PANY, F PITTSBURGH, PENNSYLVANIA, A CORPORATION OF IBENNSYLVANLA.

COKE TREATMENT AN D PRODUCT.

l i No Drawing.

This invention relates ingeneral to treatment of cellular carbonaceousresidues, such ascoke, and is of especial utility'in designating theorigin of such material so that the domestic purchasers, even though notable to determine the difference in quality of the coke from thecellular formation and arrangement, may quickly and readily determinewhether or not other kinds 'of' coke are mixed therewith. Moreparticularl this inopen, as for instance in the open basket type ofhouse heating grade. This type of fixture is often installed for heatingrooms in dwelling houses and the like and while coke is recognized asthe cleanest and best fuel, an objection which is fre uently raisedt'o-the use of coke as a fuel in suc domestic opengrates. is that itproduces a less pleasant flame from an aesthetic point of view thanwood. The present invention provides means whereby such objections maybe overcome.

The invention further consists in such other new and seful improvements,and has for further objects such other operative advantages or results,as may be found to obtain in the processes and articles hereinafterdescribed or claimed.

' The substances that may be used to produce flame coloration may bethose commonly used in the pyrotechnic industry, and well known in thatart. In pyrotechnic practice, such substances are generall mixed withpotas sium chlorate or perc lorate before being added to the,combustible-material but this has been found not to be absolutelynecessary in applying such substances to coke. A summa of the morecommon chemicals in the follows, but it is understood that the inventionis not limited or confined in scope to the employment of any of thesesubstances or any combination or combinations thereof. The

invention mav be practiced successfullv with Application filed September25, 1925; Serial No. 58,493.

the useof any other substances which are found to give the color orcombination of colors, desired upon combustion of coke that has beensuitably treated. 4

Red colors are commonly obtained by the use of the salts, such as thecarbonate, nitrate and sulphate, of strontium and lithium. Blue flamesresult from the use of the carbonate, sulphide, and arsenite of copper((11100 Cub,qand CuHAsOy, respectively), andalso coloration, and theoxalate and carbonate of sodium are used when a yellow flame is desired.Such salts are comonly used with po- (KClO or perchlorate tassiumchlorate (KGIOQ, and finely divided magnesium is sometimes added toproduce a'more brilliant efi'ect. Various colors may also be'obtained,without the use of potassium chlorate, .b the e5 'calomel (HgCl). Thenitrate, chlorate and carbonate of barium are used to effect a green useof the following materials, or com ina-.'

tions thereof: black oxide of antimony, sulphate of copper, and borax,andnumerous other. substances some of which are not deemed suitable foruse for the purpose described, by reason of the offensive or poisonouscharacter of the products of volatilization.

.Prefer ably, the substances to be used are 7 dissolved or suspendedin'water, and sprayed upon the coke to be marked, thelatter beingpreferably somewhat above ordinary temperatures. For instance, thesubstances may be introduced into the quen'chin' water at the place ofmanufacture of the co e. i As an alternate method, thecoke may be dippedinto solutions or suspensions of the chemical or chemicals used. Thepreferred manner is to add the material at the final sorting at thecoke-screening station of the coke plant.

The term coke, as hereinabove used is meant to' designate the cellularcarbonaceous residue that is obtained from the distillation in theabsence of air of bituminous materials such as coal, coal tar, itch,shale oil, petroleum, and the like, an is independent of the source or.method of carbonization employed, such as ovens of the beehive orby-product type, retorts, and so on. (p

The broad idea of renderi'n coke distinc tive is described and claimedin the co nding application of F. W. Sperr, Jr., rial No. 58,492 filedof even date'herewith forv coke treatment and product.

The invention as hereinabove set forth 55a with quenching watercontaining and depositing upon the coke a flame-coloring substance orsubstances that will impart a characteristic color to the flame ofcombustion ofthe coke so quenched.

In testimony whereof I have hereunto set my hand.

' ALLISON A, KOHB.

